#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main() {
    int n;
    while (scanf("%d", &n) != EOF)
    {
        for (int i = 0; i < n; i++) {
            for (int j = 0; (i == 0 || i == n - 1) && j < n; j++) {
                printf("* ");
            }
            for (int j = 0; i != 0 && i != n - 1 && j < n; j++) {
                if (j == 0 || j == n - 1)printf("* ");
                else printf("  ");
            }
            printf("\n");
        }
    }
    return 0;
}